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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#pragma once
#include "cmConfigure.h" // IWYU pragma: keep
#include <iosfwd>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <vector>
#include "cmsys/RegularExpression.hxx"
#include "cmDepends.h"
class cmLocalUnixMakefileGenerator3;
/** \class cmDependsC
* \brief Dependency scanner for C and C++ object files.
*/
class cmDependsC : public cmDepends
{
public:
/** Checking instances need to know the build directory name and the
relative path from the build directory to the target file. */
cmDependsC();
cmDependsC(cmLocalUnixMakefileGenerator3* lg, const std::string& targetDir,
const std::string& lang, const DependencyMap* validDeps);
/** Virtual destructor to cleanup subclasses properly. */
~cmDependsC() override;
cmDependsC(cmDependsC const&) = delete;
cmDependsC& operator=(cmDependsC const&) = delete;
protected:
// Implement writing/checking methods required by superclass.
bool WriteDependencies(const std::set<std::string>& sources,
const std::string& obj, std::ostream& makeDepends,
std::ostream& internalDepends) override;
// Method to scan a single file.
void Scan(std::istream& is, const std::string& directory,
const std::string& fullName);
// Regular expression to identify C preprocessor include directives.
cmsys::RegularExpression IncludeRegexLine;
// Regular expressions to choose which include files to scan
// recursively and which to complain about not finding.
cmsys::RegularExpression IncludeRegexScan;
cmsys::RegularExpression IncludeRegexComplain;
std::string IncludeRegexLineString;
std::string IncludeRegexScanString;
std::string IncludeRegexComplainString;
// Regex to transform #include lines.
std::string IncludeRegexTransformString;
cmsys::RegularExpression IncludeRegexTransform;
using TransformRulesType = std::map<std::string, std::string>;
TransformRulesType TransformRules;
void SetupTransforms();
void ParseTransform(std::string const& xform);
void TransformLine(std::string& line);
public:
// Data structures for dependency graph walk.
struct UnscannedEntry
{
std::string FileName;
std::string QuotedLocation;
};
struct cmIncludeLines
{
std::vector<UnscannedEntry> UnscannedEntries;
bool Used = false;
};
protected:
const DependencyMap* ValidDeps = nullptr;
std::set<std::string> Encountered;
std::queue<UnscannedEntry> Unscanned;
std::map<std::string, cmIncludeLines> FileCache;
std::map<std::string, std::string> HeaderLocationCache;
std::string CacheFileName;
void WriteCacheFile() const;
void ReadCacheFile();
};
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